NFC (Apple Pay) screw hole damaged

Hello,

I replaced the On/Off/Volume strip in iPhone 6S. However, during the repair, I inadvertently damaged one of the two screw holes securing the NFC bracket (screwed it too tight, it cracked and fell off the motherboard). After that, Apple Pay stopped to work and I’m struggling to find a solution.

I read this topic: ApplePay no longer works (NFC antenna?)) which was helpful for me. However, because I damaged one of the screw holes, my case is different.

Below are photos of the damage:

What I can do to fix NFC? I was thinking of two solutions:

• soldering the silver part of the NFC bracker directly to the motherboard (there is a little bolt in the motherboard in place of the missing screw hole). But I’m afraid this will be really difficult.
• soldering/connecting the silver part of the NFC bracket to the silver panel covering cable connectors to the front panel (with 4 screws, directly below NFC bracker). I was trying to understand how this NFC bracket works and I suspect that there is a current flowing from motherboard (silver part of the NFC bracket) to the housing (screwed together with the back camera cover). So, my idea was to replace the source of current from motherboard (the original, damaged screw hole) to another source of current from the same motherboard. However, I had no success so far.

Everything else is working, especially Wifi, Bluetooth, 3G/4G, etc.

Is there something I can do to fix NFC?